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Mandarinka [93]
4 years ago
14

Help plz and teach me how to answer

Mathematics
2 answers:
professor190 [17]4 years ago
6 0
She subtracted on the right side, when she should've added.

The answer is B
"Helen should have added 17 to both sides of the equation."
alexdok [17]4 years ago
3 0
B. Helen should have added 17 to both sides of the equation.
When trying to solve an equation like that with a variable, you have to make sure both sides are even. Whatever you do to one side, you have to do to the other. So, if you add 17 to one side to cancel it out, you have to add 17 to the other side as well.
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Are the two expressions -2 +3x and 3x + (-2) equivalent?
atroni [7]

Yes. Let's look at PEMDAS. Parentheses, Exponents, <em>Multiplication</em>, <em>Addition</em>, Subtraction. As we can see, multiplication comes first. In -2 + 3x, reading it from left to right, we see the addition symbol first, but because we're supposed to do multiplication, we have to do the 3x first. The same goes for 3x + (-2).

Yes. The two expressions -2 + 3x and 3x + (-2) are equivalent.


Hope this explanation helped you out. :)

3 0
3 years ago
Read 2 more answers
The national average height for girls in the sixth grade is also 52 inches. Find the average height of the girls in this class.
Setler79 [48]

Answer:

There is not enough info to be able to answer this question properly.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Y= 1/3x+6 point (9,-3)
mafiozo [28]
For this type of equation, you will need to use point-slope formula [Y-y1=a(x-x1)] Lets work it out.

Y+3=1/3(x-9)
Y+3=1/3x-3
Subtract 3 from both sides so
Y=1/3x
4 0
3 years ago
A sweater costs $12 more than a shirt. Together they cost $46. What was the price of the shirt
enyata [817]

Answer:46 by 46 that is how much for two tshirts will cost





8 0
3 years ago
If triangle STR ~ triangle PTQ, find QT
lana [24]

Answer:

QT = 45

Step-by-step explanation:

ST = 65

SP = 26

RQ = 30

QT = 4x - 3

Given that ∆STR is similar to ∆PTQ, therefore:

\frac{ST}{PT} = \frac{RT}{QT}

Plug in the values

\frac{65}{65 - 26} = \frac{30 + (4x - 3)}{4x - 3}

Solve for x

\frac{65}{39} = \frac{30 + 4x - 3)}{4x - 3}

\frac{5}{3} = \frac{27 + 4x}{4x - 3}

Cross multiply

5(4x - 3) = 3(27 + 4x)

20x - 15 = 81 + 12x

Collect like terms

20x - 12x = 81 + 15

8x = 96

Divide both sides by 8

x = \frac{96}{8}

x = 12

✅QT = 4x - 3

Plug in the value of x

QT = 4(12) - 3 = 48 - 3

QT = 45

3 0
3 years ago
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